The MDF® ProCardial ERA™ Lightweight Cardiology Dual Head Stethoscope with Adult, Pediatric, and Infant-Neonatal Convertible Chestpiece is an innovative design with plenty of patented features. An ultra lightweight headset and sound-sealing A2X tubing are just a couple of the features you'll appreciate. Three separate bells and diaphragms for adults, children and infants are easily interchangeable to allow you to accommodate any patient.
I recently purchased this as my second stethoscope for working in the ICU. It was much lighter than it looked but has fantastic sound. I tried it against the more expensive classic cardiology and it beat it for sound and weight.